Inspect The Application (A2) - Siemens SITRANS F Series Operating Instructions Manual

If it is not possible to successfully install the sensors on the test block, then there may be a
problem with either the sensors, cabling or internal DSL cassette.
9.4

Inspect the application (A2)

Inspect the application (A2)
If the flowmeter is unable to measure flow, or gives intermittent / unstable measurement with
persistent maintenance alarm(s), then go through the following inspection steps or see if you
can find help in the examples shown in the table. First of all ensure that:
1. The sensors are installed as described in the Operating Instructions.
2. The pipe is guaranteed to be completely full, with no trapped gas (relocate installation if
possible).
3. All cable connections are secure.
4. The installation pipe is in good condition.
Depending on application, you should furthermore ensure the following:
Note
The liquid must be homogeneous in order to measure with high accuracy. If the liquid contains
solid particles of greater density than the liquid, then these solids can settle, especially at low
flow rates. This will cause instability in the sensor and lead to measurement errors.
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD
Diagnostics and troubleshooting
9.4 Inspect the application (A2)
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